Article révisé par les pairs
Résumé : The Eastern part of DR Congo is a region naturally prone to landslides. Their impact can be important in populated areas. The objective of this research is to make a preliminary local assessment of landslide elements at risk on a recent settlement area of Bukavu (Wesha watershed). We mapped 11 landslides by combining a Pléiades image, aerial photographs and Google Earth imagery with field survey. Most landslides are deep-seated rotational movements. Shallow translational features as well as mud flows are also observed. The largest landslides were already present in 1959, but their origin is certainly far much older. Land use has dramatically changed since then. In 1959, the watershed is rural, whereas in 2013 a large part is urbanized and intensely populated. This population influx has started since 2000. Many infrastructures are damaged or under threat (electric lines, water pipes, roads, schools). Several fatalities due to landslides were reported over the last years. This study is a first step towards the understanding of the processes at play in this environment subject to anthropisation.

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